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Nano Research 2022, 15(5): 3933-3939 https://doi.org/10.1007/s12274-021-4062-z
Research Article | Issue | Published: 24 February 2022

Five-fold twinned Ir-alloyed Pt nanorods with high C1 pathway selectivity for ethanol electrooxidation

Show Author's Information Yan Fang1,§,  Shiyu Guo1,§,  Dongjie Cao1,  Genlei Zhang1( ),  Qi Wang1,  Yazhong Chen1,  Peng Cui1,  Sheng Cheng1,  Wansheng Zuo2
School of Chemistry and Chemical Engineering, Anhui Province Key Laboratory of Advanced Catalytic Materials and Reaction Engineering, Anhui Province Key Laboratory of Controllable Chemistry Reaction and Material Chemical Engineering, Hefei University of Technology, Tunxi Road 193, Hefei 230009, China
Wuhu Tus-semiconductor Co., Limin East Road 82, Wuhu 241000, China

§ Yan Fang and Shiyu Guo contributed equally to this work.

Keywords:
ethanol oxidation reaction (EOR), five-fold twinned nanorod, Pt-Ir alloy, tensile-strained (100) facets, C1 pathway selectivity
Topics:
Catalytic
Cite this article:
Fang Y, Guo S, Cao D, et al. Five-fold twinned Ir-alloyed Pt nanorods with high C1 pathway selectivity for ethanol electrooxidation. Nano Research, 2022, 15(5): 3933-3939. https://doi.org/10.1007/s12274-021-4062-z
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Abstract Full text Electronic supplementary material About this article

Developing efficient and robust electrocatalysts toward ethanol oxidation reaction (EOR) with high C1 pathway selectivity is critical for commercialization of direct ethanol fuel cells (DEFCs). Unfortunately, current most EOR electrocatalysts suffer from rapid activity degradation and poor C1 pathway selectivity for complete oxidation of ethanol. Herein, we report a novel electrocatalyst of five-fold twinned (FFT) Ir-alloyed Pt nanorods (NRs) toward EOR. Such FFT Pt-Ir NRs bounded by five (100) facets on the sides and ten (111) facets at two ends possess high percentage of (100) facets with tensile strain. Owing to the inherent characteristics of the FFT NR and Ir alloying, the as-prepared FFT Pt-Ir NRs display excellent alkaline EOR performance with a mass activity (MA) of 4.18 A·mgPt−1, a specific activity (SA) of 10.22 mA·cm−2, and a Faraday efficiency of 61.21% for the C1 pathway, which are 6.85, 5.62, and 7.70 times higher than those of a commercial Pt black, respectively. Besides, our catalyst also exhibits robust durability. The large percentage of open tensile-strained (100) facets and Ir alloying significantly promote the cleavage of C–C bonds and facilitate oxidation of the poisonous intermediates, leading to the transformation of the dominant reaction pathway for EOR from C2 to C1 pathway, and effectively suppress the deactivation of the catalyst.


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About this article

Five-fold twinned Ir-alloyed Pt nanorods with high C1 pathway selectivity for ethanol electrooxidation

Show Author's information Yan Fang1,§, Shiyu Guo1,§, Dongjie Cao1, Genlei Zhang1( ), Qi Wang1, Yazhong Chen1, Peng Cui1, Sheng Cheng1, Wansheng Zuo2
School of Chemistry and Chemical Engineering, Anhui Province Key Laboratory of Advanced Catalytic Materials and Reaction Engineering, Anhui Province Key Laboratory of Controllable Chemistry Reaction and Material Chemical Engineering, Hefei University of Technology, Tunxi Road 193, Hefei 230009, China
Wuhu Tus-semiconductor Co., Limin East Road 82, Wuhu 241000, China

§ Yan Fang and Shiyu Guo contributed equally to this work.

Abstract

Developing efficient and robust electrocatalysts toward ethanol oxidation reaction (EOR) with high C1 pathway selectivity is critical for commercialization of direct ethanol fuel cells (DEFCs). Unfortunately, current most EOR electrocatalysts suffer from rapid activity degradation and poor C1 pathway selectivity for complete oxidation of ethanol. Herein, we report a novel electrocatalyst of five-fold twinned (FFT) Ir-alloyed Pt nanorods (NRs) toward EOR. Such FFT Pt-Ir NRs bounded by five (100) facets on the sides and ten (111) facets at two ends possess high percentage of (100) facets with tensile strain. Owing to the inherent characteristics of the FFT NR and Ir alloying, the as-prepared FFT Pt-Ir NRs display excellent alkaline EOR performance with a mass activity (MA) of 4.18 A·mgPt−1, a specific activity (SA) of 10.22 mA·cm−2, and a Faraday efficiency of 61.21% for the C1 pathway, which are 6.85, 5.62, and 7.70 times higher than those of a commercial Pt black, respectively. Besides, our catalyst also exhibits robust durability. The large percentage of open tensile-strained (100) facets and Ir alloying significantly promote the cleavage of C–C bonds and facilitate oxidation of the poisonous intermediates, leading to the transformation of the dominant reaction pathway for EOR from C2 to C1 pathway, and effectively suppress the deactivation of the catalyst.

Keywords: ethanol oxidation reaction (EOR), five-fold twinned nanorod, Pt-Ir alloy, tensile-strained (100) facets, C1 pathway selectivity

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Publication history
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Acknowledgements

Publication history

Received: 20 September 2021
Revised: 15 November 2021
Accepted: 08 December 2021
Published: 24 February 2022
Issue date: May 2022

Copyright

© Tsinghua University Press and Springer-Verlag GmbH Germany, part of Springer Nature 2021

Acknowledgements

This work was supported by the National Natural Science Foundation of China (No. 21908036), the China Postdoctoral Science Foundation (No. 2019M662143), the Natural Science Foundation of Anhui Province (No. 2008085QB74), and the Fundamental Research Funds for the Central Universities (No. JZ2021HGTB0116).

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